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c41e8866 SV |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* | |
3 | * KUnit tests for cpumask. | |
4 | * | |
5 | * Author: Sander Vanheule <sander@svanheule.net> | |
6 | */ | |
7 | ||
8 | #include <kunit/test.h> | |
9 | #include <linux/cpu.h> | |
10 | #include <linux/cpumask.h> | |
11 | ||
bf541358 SV |
12 | #define MASK_MSG(m) \ |
13 | "%s contains %sCPUs %*pbl", #m, (cpumask_weight(m) ? "" : "no "), \ | |
14 | nr_cpumask_bits, cpumask_bits(m) | |
15 | ||
c41e8866 SV |
16 | #define EXPECT_FOR_EACH_CPU_EQ(test, mask) \ |
17 | do { \ | |
18 | const cpumask_t *m = (mask); \ | |
19 | int mask_weight = cpumask_weight(m); \ | |
20 | int cpu, iter = 0; \ | |
21 | for_each_cpu(cpu, m) \ | |
22 | iter++; \ | |
bf541358 | 23 | KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(mask)); \ |
c41e8866 SV |
24 | } while (0) |
25 | ||
26 | #define EXPECT_FOR_EACH_CPU_NOT_EQ(test, mask) \ | |
27 | do { \ | |
28 | const cpumask_t *m = (mask); \ | |
29 | int mask_weight = cpumask_weight(m); \ | |
30 | int cpu, iter = 0; \ | |
31 | for_each_cpu_not(cpu, m) \ | |
32 | iter++; \ | |
bf541358 | 33 | KUNIT_EXPECT_EQ_MSG((test), nr_cpu_ids - mask_weight, iter, MASK_MSG(mask)); \ |
c41e8866 SV |
34 | } while (0) |
35 | ||
36 | #define EXPECT_FOR_EACH_CPU_WRAP_EQ(test, mask) \ | |
37 | do { \ | |
38 | const cpumask_t *m = (mask); \ | |
39 | int mask_weight = cpumask_weight(m); \ | |
40 | int cpu, iter = 0; \ | |
41 | for_each_cpu_wrap(cpu, m, nr_cpu_ids / 2) \ | |
42 | iter++; \ | |
bf541358 | 43 | KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(mask)); \ |
c41e8866 SV |
44 | } while (0) |
45 | ||
46 | #define EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, name) \ | |
47 | do { \ | |
48 | int mask_weight = num_##name##_cpus(); \ | |
49 | int cpu, iter = 0; \ | |
50 | for_each_##name##_cpu(cpu) \ | |
51 | iter++; \ | |
bf541358 | 52 | KUNIT_EXPECT_EQ_MSG((test), mask_weight, iter, MASK_MSG(cpu_##name##_mask)); \ |
c41e8866 SV |
53 | } while (0) |
54 | ||
55 | static cpumask_t mask_empty; | |
56 | static cpumask_t mask_all; | |
57 | ||
58 | static void test_cpumask_weight(struct kunit *test) | |
59 | { | |
bf541358 SV |
60 | KUNIT_EXPECT_TRUE_MSG(test, cpumask_empty(&mask_empty), MASK_MSG(&mask_empty)); |
61 | KUNIT_EXPECT_TRUE_MSG(test, cpumask_full(&mask_all), MASK_MSG(&mask_all)); | |
c41e8866 | 62 | |
bf541358 SV |
63 | KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_weight(&mask_empty), MASK_MSG(&mask_empty)); |
64 | KUNIT_EXPECT_EQ_MSG(test, nr_cpu_ids, cpumask_weight(cpu_possible_mask), | |
65 | MASK_MSG(cpu_possible_mask)); | |
66 | KUNIT_EXPECT_EQ_MSG(test, nr_cpumask_bits, cpumask_weight(&mask_all), MASK_MSG(&mask_all)); | |
c41e8866 SV |
67 | } |
68 | ||
69 | static void test_cpumask_first(struct kunit *test) | |
70 | { | |
bf541358 SV |
71 | KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_first(&mask_empty), MASK_MSG(&mask_empty)); |
72 | KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_first(cpu_possible_mask), MASK_MSG(cpu_possible_mask)); | |
c41e8866 | 73 | |
bf541358 SV |
74 | KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_first_zero(&mask_empty), MASK_MSG(&mask_empty)); |
75 | KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_first_zero(cpu_possible_mask), | |
76 | MASK_MSG(cpu_possible_mask)); | |
c41e8866 SV |
77 | } |
78 | ||
79 | static void test_cpumask_last(struct kunit *test) | |
80 | { | |
bf541358 SV |
81 | KUNIT_EXPECT_LE_MSG(test, nr_cpumask_bits, cpumask_last(&mask_empty), |
82 | MASK_MSG(&mask_empty)); | |
83 | KUNIT_EXPECT_EQ_MSG(test, nr_cpu_ids - 1, cpumask_last(cpu_possible_mask), | |
84 | MASK_MSG(cpu_possible_mask)); | |
c41e8866 SV |
85 | } |
86 | ||
87 | static void test_cpumask_next(struct kunit *test) | |
88 | { | |
bf541358 SV |
89 | KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_next_zero(-1, &mask_empty), MASK_MSG(&mask_empty)); |
90 | KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_next_zero(-1, cpu_possible_mask), | |
91 | MASK_MSG(cpu_possible_mask)); | |
c41e8866 | 92 | |
bf541358 SV |
93 | KUNIT_EXPECT_LE_MSG(test, nr_cpu_ids, cpumask_next(-1, &mask_empty), |
94 | MASK_MSG(&mask_empty)); | |
95 | KUNIT_EXPECT_EQ_MSG(test, 0, cpumask_next(-1, cpu_possible_mask), | |
96 | MASK_MSG(cpu_possible_mask)); | |
c41e8866 SV |
97 | } |
98 | ||
99 | static void test_cpumask_iterators(struct kunit *test) | |
100 | { | |
101 | EXPECT_FOR_EACH_CPU_EQ(test, &mask_empty); | |
102 | EXPECT_FOR_EACH_CPU_NOT_EQ(test, &mask_empty); | |
103 | EXPECT_FOR_EACH_CPU_WRAP_EQ(test, &mask_empty); | |
104 | ||
105 | EXPECT_FOR_EACH_CPU_EQ(test, cpu_possible_mask); | |
106 | EXPECT_FOR_EACH_CPU_NOT_EQ(test, cpu_possible_mask); | |
107 | EXPECT_FOR_EACH_CPU_WRAP_EQ(test, cpu_possible_mask); | |
108 | } | |
109 | ||
110 | static void test_cpumask_iterators_builtin(struct kunit *test) | |
111 | { | |
112 | EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, possible); | |
113 | ||
114 | /* Ensure the dynamic masks are stable while running the tests */ | |
115 | cpu_hotplug_disable(); | |
116 | ||
117 | EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, online); | |
118 | EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, present); | |
119 | ||
120 | cpu_hotplug_enable(); | |
121 | } | |
122 | ||
123 | static int test_cpumask_init(struct kunit *test) | |
124 | { | |
125 | cpumask_clear(&mask_empty); | |
126 | cpumask_setall(&mask_all); | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
131 | static struct kunit_case test_cpumask_cases[] = { | |
132 | KUNIT_CASE(test_cpumask_weight), | |
133 | KUNIT_CASE(test_cpumask_first), | |
134 | KUNIT_CASE(test_cpumask_last), | |
135 | KUNIT_CASE(test_cpumask_next), | |
136 | KUNIT_CASE(test_cpumask_iterators), | |
137 | KUNIT_CASE(test_cpumask_iterators_builtin), | |
138 | {} | |
139 | }; | |
140 | ||
141 | static struct kunit_suite test_cpumask_suite = { | |
142 | .name = "cpumask", | |
143 | .init = test_cpumask_init, | |
144 | .test_cases = test_cpumask_cases, | |
145 | }; | |
146 | kunit_test_suite(test_cpumask_suite); | |
147 | ||
148 | MODULE_LICENSE("GPL"); |